You could in theory get any colour from 405nm (violet) to 597nm(yellow) depending on the ratio of the 2 that you mix, and because the 597nm colour is effectively frequency doubled by two IR lines to produce the yellow, it should be possible to produce white.

so in a nutshell: Violet , blue, cyan, green, lime green, yellow and white will be possible with the correct ratios of the 2 colours.